<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-alert title="添加商品信息" type="info" show-icon center :close="false"></el-alert>
            <el-steps :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs tab-position="left" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="cateProps"   @change="handleChange"
                            expand-trigger></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox v-for="(cb, i) in item.attr_vals" :label="cb" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%" :before-close="handleClose">
            <img :src="previewPath" class="previewImg">
        </el-dialog>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
    data () {
        return {
            activeIndex: '0',
            addForm: {
                goods_name: '',
                goods_price: 0,
                goods_weight: 0,
                goods_number: 0,
                goods_cat: [],
                pics: [],
                goods_introduce: '',
                attrs: []
            },
            addFormRules: {
                goods_name: [
                    { required: true, message: '请输入商品名称', trigger: 'blur' }
                ],
                goods_price: [
                    { required: true, message: '请输入商品价格', trigger: 'blur' }
                ],
                goods_weight: [
                    { required: true, message: '请输入商品重量', trigger: 'blur' }
                ],
                goods_number: [
                    { required: true, message: '请输入商品数量', trigger: 'blur' }
                ],
                goods_cat: [
                    { required: true, message: '请选择商品分类', trigger: 'blur' }
                ]
            },
            catelist: [],
            cateProps: {
                label: 'cat_name',
                value: 'cat_id',
                children: 'children'
            },
            manyTableData: [],
            onlyTableData: [],
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            headerObj: {
                Authorization: window.sessionStorage.getItem('token')
            },
            previewPath: '',
            previewVisible: false
        }
    },
    created () {
        this.getCateList()
    },
    methods: {
        async getCateList () {
            const { data: res } = await this.$http.get('categories')
            if (res.meta.status !== 200) return this.$message.error('分类列表获取失败！')
            this.catelist = res.data
        },
        handleChange () {
            if (this.addForm.goods_cat.length !== 3) this.addForm.goods_cat = []
        },
        beforeTabLeave (activeName, oldActiveName) {
            if (this.addForm.goods_name === '' || this.addForm.goods_price === '' || this.addForm.goods_weight === '' || this.addForm.goods_number === '' || (oldActiveName === '0' && this.addForm.goods_cat.length !== 3)) {
                this.$message.error('请正确填写商品信息！')
                return false
            }
        },
        async tabClicked () {
            if (this.activeIndex === '1') {
                const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                    params: { sel: 'many' }
                })
                if (res.meta.status !== 200) return this.$message.error('动态参数列表获取失败！')
                res.data.forEach(item => {
                    item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
                })
                this.manyTableData = res.data
            } else if (this.activeIndex === '2') {
                const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
                    params: { sel: 'only' }
                })
                if (res.meta.status !== 200) return this.$message.error('静态属性列表获取失败！')
                this.onlyTableData = res.data
            }
        },
        handlePreview (file) {
            this.previewPath = file.response.data.url
            this.previewVisible = true
        },
        handleClose () {
            this.previewPath = ''
            this.previewVisible = false
        },
        handleRemove (file) {
            const filePath = file.response.data.tem_path
            const i = this.addForm.pics.findIndex(x => x.pic === filePath)
            this.addForm.pics.splice(i, 1)
        },
        handleSuccess (response) {
            const picInfo = { pic: response.data.tmp_path }
            this.addForm.pics.push(picInfo)
        },
        add () {
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) return this.$message.error('请正确填写商品信息！')
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
                this.manyTableData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals.join(' ')
                    }
                    this.addForm.attrs.push(newInfo)
                })
                this.onlyTableData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals
                    }
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs = this.addForm.attrs
                const { data: res } = await this.$http.post('goods', form)
                if (res.meta.status !== 201) return this.$message.error('添加商品失败！')
                this.$message.success('添加成功！')
                this.$router.push('/goods')
            })
        }
    },
    computed: {
        cateId () {
            if (this.addForm.goods_cat.length === 3) return this.addForm.goods_cat[2]
            return null
        }
    }
}
</script>

<style lang="less" scoped>
    .el-steps {
        margin-top: 20px;
    }

    .el-tabs {
        margin-top: 20px;
    }

    .previewImg {
        width: 100%;
    }

    .btnAdd {
        float: right;
        margin-top: 15px;
    }
</style>
